The last of the giants give in to clean technology.

Navistar to use Urea Base treatment for new engines.  

http://www.truckinginfo.com/news/news-detail.asp?news_id=77438

Navistar’s Warranty Woes:

Its older engines don’t meet EPA standards and need more warranty work than expected. Profits have vanished as costs have risen. Competitors are winning both the technology battle and the court fights. And a hostile takeover attempt may be imminent.

http://www.warrantyweek.com/archive/ww20120621.html

John Deere adds SCR Technology to their tier 4 engines.

http://www.oneshare.com/blog/110/diesel-exhaust-fluid-ftw?goback=%2Egmp_3898555%2Egde_3898555_member_108131191